KR101798903B1 - Shaft fixture of 3D-printer - Google Patents

Abstract

The present invention relates to a shaft fixture of a three-dimensional printer, the shaft fixture which can reduce manufacturing time and costs by enabling the shaft, which is to move a nozzle in X-, Y- and Z-axis directions from the three-dimensional printer, to be directly connected to the three-dimensional printer side without a separate coupling configuration. The shaft fixture of the three-dimensional printer according to a preferred embodiment of the present invention comprises: a plate which has installation grooves formed oppositely to each other in both sides thereof, and in which second fastening holes are penetratingly formed in upper and lower sides of the installation grooves; an X-axis shaft of which both ends are inserted into the installation grooves; a first support piece which is positioned at a front surface of the X-axis shaft inserted into the installation grooves such that one side of the X-axis shaft is supported, and in both sides thereof third fastening holes communicating with the second fastening holes are penetratingly formed; a second support piece which is positioned at a rear surface of the X-axis shaft inserted into the installation grooves such that the other side of the X-axis shaft is supported, and in both sides thereof fourth fastening holes communicating with the second and third fastening holes are penetratingly formed; fastening bolts which are integrally penetrated into the second, third and fourth fastening holes; and fastening nuts which are coupled to end portions of the fastening bolts by screws such that positions of the first and second support pieces are fixed at the plate side.

Description

A shaft fixture of a 3D printer {Shaft fixture of 3D-printer}

The present invention relates to a 3D printer in which a shaft for moving a nozzle in X-axis, Y-axis, and Z-axis directions is directly connected to a 3D printer without a separate fastening structure, .

In recent years, the use of 3D printers capable of molding the objects as they are using 3D data on objects has been increasing. These 3D printers have been used for pre-mass modeling and sample production. Recently, however, a technical basis has been established that can be used in the mass production of mass-produced products centered on small-volume products of various types.

Such a 3D printer is a 3D printer in which a wire or filament made of thermoplastic plastic is supplied through a transfer device and the supplied wire or filament is mounted on a three-dimensional transfer mechanism that is positioned relative to the workbench in three directions X, A filament melt lamination molding method is mainly used in which the resin is melted and discharged from a nozzle to form a two-dimensional planar shape and laminate it on a work surface to form an object in three dimensions. Such a three-dimensional printer method is referred to as an FDM (Fused Deposition Modeling) method in which a thin thermoplastic resin is melted and injected through nozzles and laminated one by one.

In addition, the MJM (Multi Jet Modeling) method in which a photocurable resin is melted through a nozzle and injected like an ink jet printer and then cured by UV light is laminated, or the principle in which a scanned portion is cured by injecting a laser beam into a photo- A SLS (Selective Laser Sintering) method using a principle of solidification using a functional polymer or a metal powder instead of a photo-curing resin in an SLA (Stereo Lithographic Apparatus) method and an SLA is used.

However, in such a conventional 3D printer, a shaft is provided to move the nozzle in the X-axis, Y-axis, and Z-axis directions, and a separate fastening structure for fixing the shaft has to be provided. Therefore, the configuration is complicated, and the fabrication cost is increased and the fabrication period is long.

1. Korean Patent Publication No. 10-2015-0134184 (December 01, 2015) 2. Korean Patent Registration No. 10-1533374 (June 26, 2015) 3. Korean Patent Publication No. 10-2016-0021540 (Feb. 26, 2016)

Accordingly, it is an object of the present invention to provide a 3D printer in which a shaft for moving a nozzle in X-axis, Y-axis, and Z-axis directions is directly connected to a 3D printer without a separate fastening structure, And the shaft fixing member.

An object of the present invention is to provide an apparatus and a method for mounting an apparatus and a method for mounting an apparatus and a method for mounting the apparatus thereon, the apparatus comprising: a plate having mounting grooves formed on both sides thereof facing each other, A first support piece located on the front surface of the inserted X-axis shaft and having one side of the X-axis shaft supported, and a third coupling hole communicating with the second coupling hole on both sides thereof; A second support piece which is positioned on the rear surface of the shaft shaft and through which the other end of the X-axis shaft is supported, and a fourth fastening hole communicating with the second fastening hole and the third fastening hole is formed on both sides of the second fastening hole; A fastening bolt which is integrally passed through the third fastening hole and the fourth fastening hole and a fastening bolt which is screwed to the end of the fastening bolt to fix the first and second fastening pieces to the plate side The 3D printer of the shaft, characterized in that the fastener comprises a nut which is achieved by the offered.

In the present invention, a spacer is selectively provided between the plate and the first support piece and between the plate and the second support piece.

In the present invention, the mounting recesses on both sides facing each other are formed so as to correspond to the length of the X-axis shaft such that both ends of the X-axis shaft are closely in contact with each other.

In the present invention, a nut fixing groove is formed at one side of the second support member.

In the present invention, a second fixing groove is formed on both sides of the plate, a second bushing is positioned in the second fixing groove, and a Z-axis shaft through which the vertical movement of the plate is guided, do.

In the present invention, a fifth fastening hole is formed on both sides of the second fixing groove.

In the present invention, a second driving motor is operatively installed on both sides of the 3D printer, and a screw having an outer peripheral thread is vertically connected to the driving shaft of the second driving motor, and parallel to the Z axis of the 3D printer And a hexagonal fixing nut is screwed to the screw so that the screw is vertically moved by the screw when the second driving motor is operated, Wherein a side surface of the second bushing is fixedly inserted into the nut fixing groove and one surface thereof is supported on the plate side to prevent the flow of the screw when the screw is rotated, A sixth fastening hole corresponding to the fifth fastening hole is formed, and a second fastening hole corresponding to the second fastening hole is integrally formed in the fifth fastening hole and the sixth fastening hole, The second fastening nut is fastened to the end of the second fastening bolt and the third fastening bolt is fastened to fix the other end of the second bushing and the fastening nut to the fastening bolt So that the plate is moved vertically along the Z-axis shaft during operation of the second drive motor.

According to the shaft fixture of the 3D printer according to the present invention as described above, the shaft for moving the nozzle in the X axis, Y axis and Z axis direction in the 3D printer is directly connected to the 3D printer side without a separate fastening configuration Thereby reducing manufacturing time and cost.

1 is a perspective view of a 3D printer provided with a shaft fixture of a 3D printer according to an embodiment of the present invention;
2 is a partially exploded perspective view of a shaft fixture of a 3D printer according to an embodiment of the present invention;
3 is a partial cross-sectional view of a 3D printer provided with a shaft fixture of a 3D printer according to an embodiment of the present invention;
4 is a partial perspective view of a screw fastener of a 3D printer provided with a shaft fastener of a 3D printer according to an embodiment of the present invention.
5 is a partially exploded perspective view of a screw fastener of a 3D printer provided with a shaft fastener of a 3D printer according to an embodiment of the present invention.
6 is a partial perspective view of a nozzle fixing bracket of a 3D printer provided with a shaft fixture of a 3D printer according to an embodiment of the present invention;
FIG. 7 is a partially exploded perspective view of a nozzle fixing bracket of a 3D printer provided with a shaft fixture of a 3D printer according to an embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the scope of the present invention being limited only by the terms of the appended claims.

FIG. 1 is a perspective view of a 3D printer equipped with a shaft fixture of a 3D printer according to an embodiment of the present invention, FIG. 2 is a partially exploded perspective view of a shaft fixture of a 3D printer according to an embodiment of the present invention, 4 is a perspective view of a 3D printer according to an exemplary embodiment of the present invention. Referring to FIG. 4, the 3D printer includes a shaft fixture, FIG. 5 is a partially exploded perspective view of a screw fixture of a 3D printer provided with a shaft fixture of a 3D printer according to an embodiment of the present invention, FIG. 6 is a partial perspective view of a 3D printer according to an exemplary embodiment of the present invention, FIG. 7 is a partial perspective view of a nozzle fixing bracket of a 3D printer provided with a shaft fixing member of a 3D printer according to an embodiment of the present invention. Fig. 3 is a partially exploded perspective view of the nozzle fixing bracket of the printer. Fig.

The shaft fastener of the 3D printer according to a preferred embodiment of the present invention is characterized in that the shaft fastener of the present invention has a plate on which mounting grooves are formed so as to be opposed to each other on both sides and a second fastening hole is formed on upper and lower sides of the mounting groove, And a second coupling hole formed on the front surface of the X-axis shaft inserted in the installation groove to allow one side of the X-axis shaft to be supported, and a third coupling hole communicating with the second coupling hole on both sides, And a second fastening hole formed on a rear surface of the X-axis shaft inserted in the mounting groove to allow the other side of the X-axis shaft to be supported, and a fourth fastening hole communicating with the second fastening hole and the third fastening hole on both sides, A fastening bolt integrally passed through the first fastening hole, the second fastening hole, the second fastening hole, the second fastening hole, the second fastening hole, the third fastening hole, and the fourth fastening hole; And a fastening nut for fixing the support piece to the plate side.

Hereinafter, the components of the shaft fixing device B of the 3D printer according to the preferred embodiment of the present invention and the connection relationship between the components will be described in detail with reference to FIGS. 1 to 7. FIG. Although the preferred embodiment of the present invention has been described for the X-axis shaft, it is to be noted that the Y-axis shaft and the Z-axis shaft 7 can also be fastened in the same manner.

First, the plate 170 serves to install the X-axis shaft 3. The plate 170 has a hollow portion 171 formed therein in the longitudinal direction thereof and is provided on both sides of the hollow portion 171 And the second fastening holes 173 are formed on the upper and lower sides of the mounting grooves 172, respectively.

At this time, the X-axis shaft 3 and the Z-axis shaft 7 are positioned in the hollow portion 171 and both ends of the respective shafts are inserted into the mounting groove 172 formed on both sides of the hollow portion 171. However, The Y-axis shaft 5 is not formed with the hollow portion 171 but both ends of the Y-axis shaft 5 are inserted into the mounting groove 172 formed on both sides thereof.

Both ends of the X-axis shaft 3 are respectively inserted and fixed in the mounting grooves 172 on both sides. The X-axis shaft 3 is fixed to the plate 170 side without a separate fastening structure It is a role that helps. At this time, two X-axis shafts 3 are provided on the upper and lower sides in the horizontal direction. The mounting grooves 172 on both sides facing each other are formed so as to correspond to the length of the X-axis shaft 3 such that both ends of the X-axis shaft 3 are closely in contact with each other.

A second fixing groove 174 is formed on both sides of the plate 170. The second fixing groove 174 serves to fix the position of the second bushing 175, 175 is inserted with the Z-axis shaft 7 into which the vertical movement of the plate 170 is guided.

The first support piece 180 is disposed on the front surface of the X-axis shaft 3 inserted into the mounting groove 172. The first support piece 180 is disposed on one side of the X- And a third fastening hole 181 communicating with the second fastening hole 173 is formed on both sides thereof.

The second supporting piece 190 is positioned on the rear surface of the X-axis shaft 3 inserted into the mounting groove 172. The second supporting piece 190 is disposed on the other side of the X- And a fourth fastening hole 191 communicating with the second fastening hole 173 and the third fastening hole 181 is formed on both sides thereof. The second supporting piece 190 is formed in the same shape as the first supporting piece 180 and the length of the first supporting piece 180 and the length of the second supporting piece 190 depend on the number of the shafts The number of formed fastening holes may be changed.

The first fastening bolts 200 are integrally passed through the second fastening holes 173, the third fastening holes 181 and the fourth fastening holes 191. The first fastening bolts 200 are integrally formed with the first fastening bolts 200, The fastening nut 210 is screwed to fix the first support piece 180 and the second support piece 190 to the plate 170 side. The first supporting piece 180 and the second supporting piece 190 are positioned on the front and rear surfaces of the X axis shaft 3 in which the both ends thereof are inserted in the mounting groove 172 so that the X axis shaft 3 is installed And can be fixed in position without detaching in the groove 172. At this time, a nut fixing groove 192 is formed at one side of the second support piece 190 to fix the side surface of the fixing nut 250 to be described later.

The thickness of the mounting groove 172 and the thickness of the X-axis shaft 3 are formed to be the same. However, when the thickness of the X-axis shaft 3 is thicker, the plate 170 and the first support piece 180, A spacer 220 may be optionally provided between the first support piece 190 and the second support piece 190. [

Therefore, the shaft for moving the nozzle 123 in the X-axis, Y-axis, and Z-axis direction in the 3D printer 1 is directly connected to the 3D printer 1 side without a separate fastening configuration by the shaft fixing tool B of the 3D printer The manufacturing time and cost can be reduced.

The screw 240 for vertically moving the plate 170 and the Z-axis shaft 7 for guiding the vertical movement of the plate 170 are integrally fixed by the screw fixture C of the 3D printer They can be operated independently of each other.

A second driving motor 230 is operatively installed on both sides of the 3D printer 1 and a screw 240 having an outer circumferential thread formed on the driving shaft of the second driving motor 230 is vertically connected And is rotated in accordance with whether the second driving motor 230 is driven. The hexagon-shaped fixing nut 250 is screwed to the screw 240, The side of the fixing nut 250 is inserted and fixed in the nut fixing groove 192 and the one side of the fixing nut 250 is supported on the side of the plate 170 The third supporting piece 260 is in close contact with the second bushing 175 and the fixing nut 250 while the fifth supporting piece 260 is fixed on both sides of the third supporting piece 260, A sixth fastening hole 261 corresponding to the first fastening hole 176 is formed in the first fastening hole 176 and is integrally formed with the fifth fastening hole 176 and the sixth fastening hole 261 The second fastening bolt 270 is inserted into the second fastening bolt 270 and the second fastening nut 280 is fastened to the end of the second fastening bolt 270 to fix the third supporting piece 260 to the third supporting piece 260 The other surface of the second bushing 175 and the fixing nut 250 is fixedly supported and the plate 170 is vertically moved along the Z-axis shaft 7 when the second driving motor 230 is operated.

A pair of fifth fastening holes 176 are formed on both sides of the plate 170. A second fastening groove 174 is formed between the fifth fastening holes 176. A 3D printer 1, And a second support piece 190 having a nut fixing groove 192 formed on one side thereof. At this time, the second support piece 190 fixes the rear surface of the X-axis shaft 3 described above.

A second bushing 175 is located in the second fixing groove 174 described above and the second bushing 175 is moved in the vertical direction of the plate 170 by the insertion of the Z- And to be guided. And the Z-axis shaft 7 is positioned in the second bushing 175. [

A second drive motor 230 is operatively installed on both sides of the 3D printer 1. The second drive motor 230 serves to transmit the power for vertically moving the plate 170 do.

A screw 240 is connected to the driving shaft of the second driving motor 230. The screw 240 is bi-directionally rotated in accordance with the operation of the second driving motor 230 so that the fixing nut 250) to be vertically moved. The screw 240 is threaded on its outer periphery and disposed parallel to the Z-axis shaft 7.

The screw 240 is screwed into the fixing nut 250. The fixing nut 250 is vertically moved by the screw 240 according to the operation of the second driving motor 230 And its side is inserted into the nut fixing groove 192 and one side thereof is supported on the side of the plate 170 to prevent the flow of the screw 240 when the screw 240 rotates. The fixing nut 250 is formed in the shape of a hexagonal nut so that the direction of the fixing nut 250 can be fixed when the plate 170 and the third supporting piece 260 to be described later are supported, The phenomenon of idling can be prevented.

The third support piece 260 is disposed on the other surface of the fixing nut 250 and the second bushing 175 so that the third support piece 260 is fixed to the other surface of the fixing nut 250, (175) at the same time. On both sides of the third support piece 260, a sixth fastening hole 261 corresponding to the fifth fastening hole 176 is formed.

The second fastening bolt 270 is integrally passed through the fifth fastening hole 176 and the sixth fastening hole 261 and the second fastening nut 280 is fastened to the end of the second fastening bolt 270. [ Are screwed together. The third support piece 260 is fixed in position by fastening the second fastening bolt 270 and the second fastening nut 280 and the second bushing 175 is fixed to the third support piece 260 by the third support piece 260. [ The plate 170 can be vertically moved along the Z-axis shaft 7 when the second driving motor 230 is operated.

Therefore, the screw 240 and the Z-axis shaft 7 of the 3D printer 1 are not installed by the respective fastening structures but can be independently operated by the screw fastener C of the 3D printer, Time and cost can be saved. Both sides of the fixing nut 250 moved along the screw 240 along the rotation direction of the screw 240 are fixed by the plate 170 and the second supporting piece 190, The nozzle 123 can be moved to the correct position without error by preventing the malfunctioning of the fixing nut 250 when the screw 240 is rotated.

In the meantime, the above-mentioned plate 170 is provided with a nozzle 123, a sensor 126, and a cooling fan, and is provided with a 3D sensor 140, to which the belt 140 is connected so that the components can be moved horizontally along the plate 170. [ A nozzle fixing bracket A of the printer is provided.

The nozzle fixing bracket A of the 3D printer described above is horizontally movably provided on the side of the plate 170 provided with the X-axis shaft 3 of the 3D printer 1, A second surface 120 which is horizontally bent forward in the lower end of the first surface 110 and a second surface 120 which is horizontally bent forward in the lower surface of the first surface 110, A bracket 100 formed on both sides of the upper surface of the first surface 110 and having a first surface 110 and a second surface 110 facing each other in a horizontal direction from an edge of the first surface 110 to a third surface 130 bent upward at an end of the first surface 110, And a cutout hole 111b extending in a circular shape from the inner end of the cutout cutout 111a is formed in the cutout 111a and the cutout 111b of the cutout 111b, And a belt 140 connected to the bracket 100 to horizontally move the bracket 100 on the X-axis shaft 3, And a belt fixing portion 111 formed with a pair of engagement grooves 111c to which the projections 141 of the engaging projections 141 are engaged.

The bracket 100 described above functions to install the nozzle 123 of the 3D printer 1 in an operable manner and is mounted on the plate 170 so as to be horizontally moved along the X- .

The bracket 100 is installed on the side of the plate 170 having the X-axis shaft 3 so as to be horizontally movable. The bracket 100 is movably installed on the X-axis shaft 3, A second surface 120 that is bent in a horizontal direction forward from the lower end of the first surface 110 and a third surface 130 that is bent upward at an end of the second surface 120, ). That is, the second surface 120 is bent perpendicularly from the lower end of the first surface 100 and the third surface 130 is bent at an angle of 60 to 80 degrees from the tip of the second surface 120. At this time, it is preferable that the bracket 100 is made of a metal material through which the heat can be smoothly dissipated through the heat dissipating slit 121 to be described later.

A belt fixing part 111 is formed on both sides of the upper surface of the first surface 110. A belt 140 for moving the bracket 100 is connected to the belt fixing part 111, The sensor 126, the cooling fan 132, and the like are operatively installed.

The belt fixing part 111 includes a cutout groove 111a cut horizontally inward from the edge of the first surface 110 and a cutout 111a formed in a circular shape extending from the inner end of the cutout cutout 111a And a ball 111b. The upper edge of the cutout groove 111a and the outer edge of the cutout hole 111b are connected to the bracket 100 so that the protrusion 141 of the belt 140 for horizontally moving the bracket 100 on the X- Are engaged with each other. At this time, both ends of the belt 140 are inserted into the cut-out hole 111b and the cut-out groove 111a in a state where the end of the belt 140 is wound in a circular shape, and a portion of the protrusion 141 is fixed in the engaged groove 111c. And a rivet 111d is fastened and fixed to the cutout hole 111b by bolts and nuts so that the belt 140 is not released

The first driving motor 150 is operatively installed at one end of the plate 170. The first driving motor 150 rotates the bracket 100 to the X- In the horizontal direction. At this time, a roller 160 is rotatably installed at the other end of the plate 170, and the roller 160 is positioned on a horizontal line with the driving shaft of the first driving motor 150. A belt 140 is wound around the drive shaft and the roller 160 of the first drive motor 150 so that the bracket 100 is moved horizontally along the X- Can be moved.

The first fixing groove 112 is formed on the first surface 110 so that the first bushing 113 through which the X-axis shaft 3 passes can be fixed. A pair of first fastening holes 114 are provided between the upper and lower first fixing grooves 112 so as to be fastened to the fastening member 115 which is disposed behind the X-axis shaft 3 and fixed to the bracket 100, Are formed in the horizontal direction.

A plurality of heat dissipating slits 121 are formed in the second surface 120. The heat dissipating slits 121 serve to dissipate the heat of the nozzles 123 into the air. And extends to a portion of the first surface 110 and the third surface 130.

A nozzle mounting hole 122 is formed in the center of a second surface 120 on which the heat dissipating slit 121 is formed and a protrusion 124 having a sensor fixing hole 125 penetrating through a side surface of the second surface 120 And a cooling fan mounting hole 131 is formed in a horizontal direction so that a pair of cooling fans 132 can be installed at the end of the third surface 130.

The nozzle 123 of the 3D printer 1 and the belt 140 for moving the nozzle 123 along the shaft are installed in one bracket 100 by the nozzle fixing bracket A of the 3D printer The construction is simple, and the production period and cost can be reduced.

It is to be understood by those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit or scope of the present invention, It is therefore intended that the above-described embodiments be considered as illustrative rather than restrictive, and that all implementations within the scope of the appended claims and their equivalents are intended to be included within the scope of the present invention.

A: Nozzle fixing bracket for 3D printer
B: 3D printer's shaft fixture
C: screw fixture of 3D printer
1: 3D printer
3: X-axis shaft
5: Y shaft
7: Z shaft
100: Bracket
110: first side
111: Belt fixing portion
111a: incision groove
111b: incision ball
111c:
111d: Rivet
112: first fixing groove
113: first bushing
114: first fastening hole
115: fastening member
120: second side
121: Heat dissipating slit
122: nozzle mounting hole
123: Nozzles
124:
125: Sensor fixture
126: Sensor
130: Third side
131: Cooling fan mounting hole
132: Cooling fan
140: Belt
141:
150: first drive motor
160: Roller
170: Plate
171:
172: Installation home
173: second fastening hole
174: second fixing groove
175: Second bushing
176: Fifth fastening hole
180: first supporting piece
181: Third fastening hole
190: second supporting piece
191: Fourth fastener
192: Nut fixing groove
200: first fastening bolt
210: first fastening nut
220: Spacer
230: second drive motor
240: Screw
250: Fixing nut
260: third supporting piece
261: Sixth fastener
270: second fastening bolt
280: second fastening nut

Claims (7)

A plate 170 formed on both sides of the installation groove 172 so as to face each other and having a second fastening hole 173 formed on the upper and lower sides of the installation groove 172;
An X-axis shaft 3 whose both ends are inserted into the mounting groove 172;
Shaft shaft 3 inserted in the mounting groove 172 so as to support one side of the X-axis shaft 3 and to be connected to the second fastening hole 173 on both sides, A first support piece 180 having a hole 181 formed therethrough;
And the other end of the X-axis shaft 3 is positioned on the rear surface of the X-axis shaft 3 inserted in the installation groove 172. The second and third fastening holes 173, A second support piece 190 through which a fourth fastening hole 191 communicating with the first support piece 190 passes;
A first fastening bolt 200 integrally passed through the second fastening hole 173, the third fastening hole 181, and the fourth fastening hole 191; And
And a first fastening nut 210 threadedly coupled to an end of the fastening bolt to fix the first support piece 180 and the second support piece 190 to the plate 170 side,
A nut fixing groove 192 is formed on one side of the second support piece 190. A second fixing groove 174 is formed on both sides of the plate 170 and a second fixing groove 174 is formed in the second fixing groove 174. [ And a second bushing 175 is disposed in the second bushing 175. A Z axis shaft 7 for guiding the vertical movement of the plate 170 is inserted into the second bushing 175, A fifth fastening hole 176 is formed on both sides,
A second driving motor 230 is operatively installed on both sides of the 3D printer 1 and a screw 240 having a thread on the outer circumference is vertically connected to the driving shaft of the second driving motor 230 Axis screw 7 of the 3D printer 1 and is rotated according to whether the second driving motor 230 is driven or not and a hex nut shaped fixing nut 250 is inserted into the screw 240 The side of the fixing nut 250 is inserted and fixed in the nut fixing groove 192 and the other side of the fixing nut 250 is inserted into the fixing groove 250. [ The third support piece 260 is in close contact with the second bushing 175 and the fixing nut 250 while the third support piece 260 is in close contact with the second bushing 175, A sixth fastening hole 261 corresponding to the fifth fastening hole 176 is formed on both sides of the second fastening hole 260, The second fastening bolt 270 is inserted into the fifth fastening hole 176 and the sixth fastening hole 261 and the second fastening nut 280 is fastened to the end of the second fastening bolt 270. The other end of the second bushing 175 and the fixing nut 250 is fixedly supported by the third support piece 260 as the third support piece 260 is fixed, And the plate (170) is moved in the vertical direction along the Z-axis shaft (7) during operation of the motor (230). The method according to claim 1,
A spacer 220 is selectively provided between the plate 170 and the first support piece 180 and between the plate 170 and the second support piece 190. [ .
The method of claim 2,
The mounting grooves 172 on both sides facing each other are formed so as to correspond to the length of the X-axis shaft 3 such that both ends of the X-axis shaft 3 are in close contact with each other. Shaft retainer for 3D printers.
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